Results 1 to 10 of about 220 (93)

Air-Lift Pumping System for Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules around Minamitorishima Island

Journal of Marine Science and Engineering
REE-rich mud under the seabed at a 5500–5700 m water depth around Minamitorishima island and polymetallic nodules buried in the deep seabed are very promising and attractive to explore and develop.
Yoshiyuki Shimizu, Masatoshi Sugihara, Koichiro Fujinaga, Kentaro Nakamura, Yasuhiro Kato   +4 more
doaj   +4 more sources

Petrography and stratigraphic Os isotopic ages of ferromanganese nodules from the Northwest Pacific east of Minamitorishima Island

Journal of Asian Earth Sciences: X
The area offshore of Minamitorishima Island, Northwestern Pacific Ocean, contains large amounts of seafloor mineral resources such as ferromanganese (Fe–Mn) nodules, Fe–Mn crusts, and rare-earth element and yttrium (REY)-rich muds.
Tatsuo Nozaki, Kosuke T. Goto, Yutaro Takaya, Kazuhiko Shimada, Akira Owada, Gen Shimoda, Jun-Ichi Kimura, Qing Chang, Tetsuji Onoue, Shiki Machida, Teruaki Ishii, Kenji Shimizu, Naoto Hirano, Kazuhide Mimura, Moei Yano, Junichiro Ohta, Yasuhiro Kato   +16 more
doaj   +4 more sources

Numerical Simulation on Hybrid Lifting Operation of Polymetallic Nodules and Rare-Earth Elements-Rich Mud by Air-Lift Pump in Deep Sea around Minamitorishima Island

Journal of Marine Science and Engineering
Polymetallic nodules and REE-rich mud under the seabed of 5500–5700 m water depth around Minamitorishima island are promising and attractive for exploration and development.
Yoshiyuki Shimizu, Masatoshi Sugihara, Koichiro Fujinaga, Kentaro Nakamura, Yasuhiro Kato   +4 more
doaj   +4 more sources

Magnetostratigraphic evidence for post-depositional distortion of osmium isotopic records in pelagic clay and its implications for mineral flux estimates [PDF]

Earth, Planets and Space, 2021
Chemical stratigraphy is useful for dating deep-sea sediments, which sometimes lack radiometric or biostratigraphic constraints. Oxic pelagic clay contains Fe–Mn oxyhydroxides that can retain seawater 187Os/188Os values, and its age can be estimated by ...
Yoichi Usui, Toshitsugu Yamazaki
doaj   +3 more sources

Combined Mining and Pulp-Lifting of Ferromanganese Nodules and Rare-Earth Element-Rich Mud around Minamitorishima Island in the Western North Pacific: A Prefeasibility Study [PDF]

Minerals (Basel, Switzerland), 2021
An examination of the technical and economic feasibility of the combined mining of the rare-earth element-rich mud (REE-rich mud) and ferromanganese nodules (FN) around Minamitorishima (Marcus) Island in Northwest Pacific is introduced. A previous study showed that the mining of REE-rich mud around Minamitorishima Island was not economically feasible ...
Tetsuo Yamazaki
exaly   +2 more sources

Evaluation of a new JMA aircraft flask sampling system and laboratory trace gas analysis system [PDF]

Atmospheric Measurement Techniques, 2013
We established and evaluated a flask air sampling system on a cargo C-130H aircraft, as well as a trace gas measurement system for the flask samples, as part of a new operational monitoring program of the Japan Meteorological Agency (JMA).
K. Tsuboi, H. Matsueda, Y. Sawa, Y. Niwa, M. Nakamura, D. Kuboike, K. Saito, H. Ohmori, S. Iwatsubo, H. Nishi, Y. Hanamiya, K. Tsuji, Y. Baba   +12 more
doaj   +4 more sources

Integrated acoustic identification of a petit-spot volcanic field in the oldest Pacific plate [PDF]

Scientific Reports
Petit-spot volcanism plays a critical role in the metasomatism of oceanic plates prior to subduction and in their recycling into the deep mantle. The extent of metasomatism depends on the number and volume of petit-spot volcanic edifices and intrusions ...
Shiki Machida, Junji Kaneko, Kazuhiro Inose, Tatsuo Nozaki, Koichi Iijima, Naoto Hirano   +5 more
doaj   +2 more sources

Intermittent Beginning to the Formation of Hydrogenous Ferromanganese Nodules in the Vast Field: Insights from Multi-Element Chemostratigraphy Using Microfocus X-ray Fluorescence [PDF]

Minerals (Basel, Switzerland), 2021
南極からの海洋深層水が「国産コバルト資源」を生み出した --南鳥島周辺に広大なマンガンノジュール密集域が形成された原因を特定--. 京都大学プレスリリース. 2022-01-12.Vast ferromanganese nodule fields have been found on the deep-sea floor of all oceans worldwide.
Shiki Machida, Kentaro Nakamura, Tetsu Kogiso   +2 more
exaly   +3 more sources

The tremendous potential of deep-sea mud as a source of rare-earth elements. [PDF]

Sci Rep, 2018
金沢大学理工研究域地球社会基盤学系Potential risks of supply shortages for critical metals including rare-earth elements and yttrium (REY) have spurred great interest in commercial mining of deep-sea mineral resources.
Takaya Y, Yasukawa K, Kawasaki T, Fujinaga K, Ohta J, Usui Y, Nakamura K, Kimura JI, Chang Q, Hamada M, Dodbiba G, Nozaki T, Iijima K, Morisawa T, Kuwahara T, Ishida Y, Ichimura T, Kitazume M, Fujita T, Kato Y.   +19 more
europepmc   +3 more sources

Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules by Air-Lift Pump in Deep Sea around Minamitorishima Island

Journal of MMIJ
REE-rich mud and polymetallic nodules located under the seabed at water depth of 5500–5700 m around Minamitorishima island are highly attractive for exploration and development, given the recent paradigm shift towards renewable energies based on green ...
Yoshiyuki SHIMIZU, Masatoshi SUGIHARA, Yutaro TAKAYA, Koichiro FUJINAGA, Kentaro NAKAMURA, Yasuhiro KATO   +5 more
doaj   +3 more sources